Which altitude must be reported if winds are significant?

If winds are significant, it is important to report any altitude where winds are observed. This is crucial for flight safety and planning, as strong or turbulent winds can affect aircraft performance and flight paths. Reporting all observed altitudes helps air traffic control and other pilots to be aware of potentially hazardous conditions, allowing them to take necessary precautions or adjust their flight plans accordingly. Therefore, stating any altitude where winds are observed ensures comprehensive communication of relevant weather conditions that could impact aviation operations.